|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P3-75: In-package Material Corrosion: Major Source of Hydrogen in Breached Waste Container
||Eric G. Lee, James Jerden, Vineeth Gattu, William Ebert, Ernesto Indacochea
|On-Site Speaker (Planned)
||Eric G. Lee
The degradation rate of spent oxide fuel depends strongly on the concentration of dissolved H2 and metal corrosion is the dominant H2 source within a breached waste container under anoxic conditions. We used electrochemical methods to measure the corrosion rates of metals used in waste packages under environmental conditions that could occur in a breached package. A potentiostatic method was used to monitor the anodic corrosion current over several days as the metal corroded in a solution with imposed pH and chloride concentration at an imposed surface voltage representing the solution redox. The steady currents achieved after a few days were combined with the amounts of each metal in a waste package to calculate sequentially the H2 concentration, the fuel surface potential, and the fuel degradation rate using the ANL Fuel Matrix Degradation model. Results of tests with several materials and how the measured rates were used will be presented.